CLASS RACER FORUM - View Single Post - more horsepower news tues 7/23 on competion page

Nick Heath · 07-24-2014, 02:15 PM

Can someone help me understand how the replacement head for the Mopar 440s is rated less than the factory head?

440/375 rated at 350 with factory head, 345 with replacement head
440/390 rated at 395 with factory head, 391 with replacement head

What am I missing here?

07-24-2014, 02:15 PM	#2
Nick Heath Member Join Date: Sep 2010 Location: Jersey Shore Posts: 359 Likes: 1,444 Liked 566 Times in 135 Posts	Re: more horsepower news tues 7/23 on competion page Can someone help me understand how the replacement head for the Mopar 440s is rated less than the factory head? 440/375 rated at 350 with factory head, 345 with replacement head 440/390 rated at 395 with factory head, 391 with replacement head What am I missing here?